Imanity-go (人類種語,Imaniti go)? or Imanity language is the language used by the Imanity, which is orally same as Japanese but different in writing. It first appears in Episode 2. Shiro learnt the language in less than twenty minutes, while Sora said he would take about an hour more.
The anime language is described to be almost identical to Japanese, as it is pronounced the same but with different characters for hiragana. Imanity-go in the light novels is different, using Latin grammar and Ancient Chinese syntax. Imanity-go's numbers are in base 6.